When to Register Your Startup and Which Legal Structure to Choose

The legal structure decision is one founders often either obsess over too early or ignore too long. The truth is the right time to incorporate is when one of three things happens: you're taking money from someone, you're employing someone, or you're generating revenue that creates meaningful personal liability. Before that, it's often fine to defer.

Sole Trader vs Limited Company

Operating as a sole trader (eenmanszaak in the Netherlands, sole proprietorship elsewhere) is the default when you start working independently. It's fast to set up, low cost, minimal administration. But it has one fundamental problem: your personal assets and business assets are the same thing. A customer dispute, a vendor contract gone wrong, or a tax liability means your house, your savings, and your startup are all at risk.

A limited company (BV in the Netherlands, Ltd in the UK, GmbH in Germany) creates a legal entity separate from you. The company enters contracts, owns assets, and incurs liabilities. Your personal exposure is generally limited to what you've invested in the company — though there are exceptions when directors act recklessly or fraudulently.

If you're building something with any meaningful commercial activity, the liability protection alone makes incorporating worth the cost. Add in that investors cannot invest in a sole trader (they need equity, which requires a separate legal entity), and the decision becomes straightforward.

The Main Options for European Founders

Netherlands: BV (Besloten Vennootschap)

The Dutch BV is the standard structure for tech startups in the Netherlands. Since 2012 the minimum share capital requirement dropped to €0.01, making it accessible from day one. Formation takes 1–3 days through a notary (a notarized deed of incorporation is required) and costs roughly €600–€1,500 in notary and registration fees depending on complexity.

Key characteristics:

• Shareholders have limited liability
• Directors (bestuurders) can be held personally liable for serious mismanagement
• Equity is held as shares; options can be granted (but require attention to Dutch tax law, specifically the 30% ruling and employee stock option taxation)
• Annual accounts must be filed with the KvK (Chamber of Commerce)
• Corporate income tax: 15% on first €200K profit, 25.8% above that (2024 rates)

For founders planning to raise from Dutch or European VCs, the BV works well. For founders specifically targeting US VCs or planning a US institutional round, you may face pressure to flip to a Delaware C-corp.

UK: Private Limited Company (Ltd)

The UK Ltd is one of the fastest and cheapest companies to form in the world — it can be done online through Companies House in 24 hours for £12. The UK's startup legal ecosystem is mature, with standardized SEIS/EIS-compatible investment documents and ASA (Advanced Subscription Agreement) templates from SeedLegals that work well for early rounds.

Post-Brexit, UK founders targeting EU customers may face some friction (no automatic GDPR adequacy for UK data flows, some regulatory complexity for financial services), but for most B2B SaaS companies it's not a material issue. The UK's EMI (Enterprise Management Incentives) option scheme is genuinely excellent for employee equity — tax-advantaged in ways that Dutch or German option schemes generally aren't.

Delaware C-Corporation (US)

Delaware C-corp is the default structure for US venture-backed startups and increasingly for European startups raising from US VCs. Why Delaware? US institutional investors, especially Sand Hill Road funds, typically have limited partnership agreements that restrict investment in non-Delaware entities. The Delaware Court of Chancery also provides extremely well-developed corporate case law.

A Delaware C-corp can be formed entirely online through services like Stripe Atlas, Firstbase, or a startup-focused law firm like Clerky. Formation costs $300–$1,500 plus state franchise taxes (calculated on authorized shares — a common optimization is to use the "assumed par value capital method" to reduce the annual franchise tax from potentially tens of thousands to a few hundred dollars).

For European founders: owning a Delaware C-corp as a Dutch or UK resident creates cross-border tax complexity. You'll need tax advice on how dividends, capital gains, and founder salaries flow between entities. It's manageable but not free.

What Structure Matters for Investors

Dutch/European angels and seed funds will generally invest into a BV or Ltd without requiring a flip.

US institutional VCs (Series A+) will almost always require a Delaware C-corp or a BV/Ltd with a Delaware holding company above it. The "flip" transaction — converting your existing BV into a Delaware C-corp — is a well-understood process, typically costing €15K–€30K in legal fees, and involving a share-for-share exchange and shareholder approval. Plan for it if you're targeting US investors at scale.

UK VCs using SEIS/EIS require a UK Ltd incorporated in the UK. SEIS and EIS provide UK taxpayers with substantial tax relief on startup investments, which makes UK angels and small funds significantly more price-elastic when the company qualifies.

IP Ownership and Employment Structure

One of the most important — and underrated — functions of your legal structure is ensuring that intellectual property belongs to the company, not to individual founders or contractors.

When you incorporate, the company you create owns nothing by default. You need to explicitly assign any IP that was created before incorporation: any code written, designs created, or inventions developed. This is done through an IP assignment agreement signed at or around incorporation.

Every employee contract should include an IP assignment clause (see your jurisdiction's employment law for limits — Dutch law has restrictions on employer claims to inventions employees develop outside work hours). Every contractor agreement should clearly state that work product is a work-for-hire and owned by the company.

Investors will run an IP review as part of due diligence. If your core technology was built by a co-founder who left without signing an IP assignment, you have a serious problem that will either block the deal or require expensive remediation.

Getting these foundational documents right at inception is substantially cheaper than fixing them later. A startup-specialized lawyer — not a generalist — will know the standard templates and flag the non-standard issues that matter. Founders choosing their legal structure for the first time also benefit from working through the decision with advisors who have been through it — a platform like Founderboard can be a useful place to pressure-test your structure choice before you pay a lawyer to implement it.